* Path cleanup for SITL.

* Restructured sitl scripts dir.

* Set integration tests to use ekf2 for vtol.

* Fix sitl paths for mac.

* Low impact changes from path_cleanup branch.

This is a step towards minimizing the diff with path_cleanup branch.

* Update ecl.

* Revert matrix update.

* Revert ecl and matrix.

* Update sitl gazebo.

* Revert sitl_gazebo and matrix changes.

This reverts commit 699b6a2c.

This adds a new module that does:
- read an parse an ULog file, given via ENV variable 'replay'
- apply all parameters from the log file
- read and apply user-defined override parameters from a file
- publish all messages in 'real-time' from the log file and add a constant
  offset to the timestamp to match the system time.
- apply changed parameters in the log (which are not overridden)

Useful to test maximum sequential write speed to the SD Card

* Use DriverFramework as a PX4 module

Targets wanting to use DriverFramework must add

   lib/DriverFramework/framework

to their config file.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

* Removed spurious code

No need to add if check before for loop

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

* Added DriverFramework to NuttX configs

Added lib/DriverFramework/firmware to nuttx configs

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

* Updated src/lib/DriverFramework

* Removed DF_TARGET and __DF_${OS} defines

These are now handled inside DriverFramework

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

* Updated DriverFramework

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

* Restored __DF_${OS}

The include files in DriverFramwork need to know the target OS.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

This reverts commit 76df4ecf.

- Note that the simulator still uses gpssim by default
- now the gps module can be used in the SITL. this makes it possible to test
  the real gps HW under POSIX
  additional steps needed to use it:
  - in the rcS_jmavsim_iris, make sure to start the gps instead of gpssim:
    gps start -d /dev/ttyACM0 -s
  - disable the mavlink serial connection in simulator_mavlink.cpp,
    openUart(PIXHAWK_DEVICE, 115200);
- this also fixes a memory leak in the gps module

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Unfortunately this still gives linking errors.

The code here works only for SITL at the present time.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>